Wieacker-Wolff syndrome (WWS) is an X-linked disorder caused by a pathogenic mutation in the ZC4H2 gene. It affects both the central and peripheral nervous systems. The authors describe the case of a six-year-old boy with global developmental delay since the age of four months, with marked axial hypotonia. He had a history of bilateral clubfoot, feeding difficulties, and recurrent respiratory infections. Physic...